Locomotive-boiler superheater.



H. S. VINCENT. LocoMoTwE BOILER SUPEHHEATER.

x APPLICATION FILED NNE l2, 19H. 1,266,184.

Patented May14,1918.

NV TDR @IWW HARRY S. VINCENT, 0F BIDGEWOOD, NEW JERSEY.LOCOHOTIVE-BOILEE SUPEBHEATEB.

Specicatlon o! Letten Patent.

Patented May 14, 1918.

Application led June 12, 191?. Serial No. 174,174.

'To all 'whom it may concern:

Be it known that I, HARRYl S. VINUENT, of Ridgewood, in the county ofBer en and State of New Jersey, have invente a certain new and usefulImprovement in Locomotive-Boiler Superheaters, of which improvement thefollowing is a specification.

y invention relates, generally, to superheaters of the lire tube typefor locomotive boilers, and, particularly, to those of the design ofthat ty e, in which the throttle valve is interposed) between thesuperheated steam compartment of the superheater and the cylinders ofthe locomotive, an early instance of which is exemplified in LettersPatent of France No 9.7012, granted to la Compagnie du Nord, under dateof December 4, 1860.

yThe object bfmy invention is -to provide means 4for conveyingsuperheated steam from a locomotive boiler superheater to the enginecylinders, and controlling the supply, between the` superheater and thec ylinders, which shall be of sim 1e and mexpensive construction` and heoeated, except `for a limited poi-tion of their extent, cn-

tirelv exterior to the boiler; and which shall, further, be applicablein connection with superheaters of the resent standard type, withoutsubstantial c ange in the com struction thereof.

The im rovement claimed is hereinafter fully set orth: l,

In the accompanying drawings: Figure 1 is a side view, in elevation, ofthe forward vportion of a ,locomotive engine, illustrating anapplication of my invention; Fig. 2, a front view, in elevation, of thesame; Fig. 3, il. view, taken similarly to Fig. 1, illustrating astructural modification; Fi 4, a view, taken similarly to Fig. 2, anartly in section, of the structural modi cation shown-in Fig. 3; Fig. 5,a partial vertical longitudinal sectiononan cnlarged scale, on the linea: of Fig. 6, and; Fig. 6, a vertical transverse section. on the line y1/ of Fi 5.

y invention is herein exemplified, as applied in a locomotive boiler, 4,which is of the usual construction, and is provided, at its forward endwith a. smoke box, 4, which is supported on the ordinary cylindersaddles, 12. A plurality of fire tubes, some of which, 6?, are of largerdiameter than the others, extends from a firebox at the rear end of theboiler, which is not shown, to the front flue sheet, 4", and theproducts of combustion pass 'through the tubes, in the usual manner tothe smoke box, 4, from which they are discharged into the atmos herethrough the stack, 4*'.

In t e practice of my invention, referring descriptively to the specificembodiment thereof in connection with a superlieater of the standardSchmidt type A construction which is herein illustrated, the superheaterheader, 70, is. as usual, located a. short distance forward of the frontline sheet, 4, and comprises a rear transversely extending saturatedsteam compartment, 70", which is connected by a short receivingV nozzle,or dry pipe, transversely compartment, 70.

61, and an adjoining forward extending superheated steam Saturated steamentering the compartment, 70", from the dry pipe, passes from saidcompartment through a plurality of return bend pipes,

own as units, which are located in the tubes, 6.7, in which it issuperheated by the products of combustion passing through said tubes,and is delivered therefrom to the superheatcd steam compartment, 70',from which it passes, through two branch steam pipes, 63, to the enginecylinders.

In ordinary practice, control of the admission of steam from the boiler4to the saturated steam compartment, is effected by a throttle valvelocated within the boiler, at the rear dnd of the dry pipe, andgoverning the admission of steam `from the boiler, through said pipe, tothe saturated steam .-com atment, and the branch steam pipes are is osedinside of the smoke box, each being connected to one of two nozzles atthe ends of the superheated steam compartment. In the application of ininvention. the superheater header is mo ified by eliminating the two endbranch steam pipe nozzles above stated. and substituting therefor asingle central delivery nozzle, which is connected to the casing of athrottle valve located on the outside of the boiler, and controlling thebranch steam pipes, instead of the dry pipe, the branch steam pipes, i'ithis case, leading. entirel outside of the boiler, to the engine cyliners. Under this construction, which will now be more fully described, itwill be seen that the steam space of the boiler is, atall times. in Aoen comiiunioation with the superheater lies. er,

62, with the main steam piper and, then ore, that the header andsuperheater units are continuously filled with steam, during the periodsthat the locomotive is under steam, irrespective ot whether the throttlevalve be open or closed.

The delivery nozzle, of the saturated steam compartment of the head1-r,is connected, by an angle pipe, 5, passing through the top of the smokebox, 4, with a for wardly extending nozzle, G, formed on a throttle boxor chest 0, which is supported on the outside of, and secured detachablyto, the shell of the boiler, 4, immediately in rear o the smoke box,ball joint rings, (3, being fitted between the pipe, 5, and-the nozzles,T0 and 6, to insure tight joints. The pipe 5, and throttle box, (i, arepreferably, as shown, inclosed in a light sheet metal case, 6*', and thepipe, 5, being supported by the throttle box, and this, in turn, by theboiler, no additional weight is imposed on the superheatcr header. Thebranch steam pipes, (i3, are connected to opposite sides of t e'throttle box, 6, and lead therefrom, on the outside of the smoke box,and adjacent thereto, to connections with the distribution valve chests,12", of the locomotive, following, as nearly as may be, the curvature ofthe smoke box, to a level slightly below of the boiler. A Communicationbetween the interior of the throttle box and the branch steam pipes, 63,is e'ntrolled by a throttle valve, '1, which maybe of any. suitable andpreerre constructionp'andwhich dors not, in an of itself, form part-ofinv present invention. lo the instance s own, it is balanced top liftpuppet tral le, and is secured to a balancing piston 7a. litting achamber :u the bottom of the throttle box, to which n am is sdofilted,in the usual manner, in lhfnnscatingo the valve, by a small pilot volw.T. The throltle box, 6, is closed at top by a removable ea or head, 6,in uhhh an oper in l sha t, d, is journal said ASnail, pass-'mg t rou hastuii'mg box, 8

the center line on ono side ofthe thrott e box, and carrying i an in dearm,"3b, which is coupled to the th rattle valve, and an outside arm, 8,which ic coupled, by agl ink, 8", to one arm of abell croi-l; lever,8,journale on the boiler the other arm of said lever being coupled by athrottle rod, 8l, to a throttle lever' shown)` in the cab of thelocomotive. will, however, be understood that the specific constructionand operating mechanism o the throttle valve', are not essentials of myinvention, an that other designs, of whicv many are known in the art,may be substituted. in the discretion of the constructor.

A circulating pipe, 9, of small diameterjs connected to a nozzle on the.rear side of the throttle box, opening into the space above the throttlevalve, and leads therefrom either to a connection with the steam space,or preferof the single seat4 (not It' secure by ably to an automaticdrifting mechanism, in locomotives on which the latter is applied. Bythe flow of steam from the satura steam compartment, through said pipe,a moderate circulation of steam through the superheater units will beeffected when the throttle valve is closed.

Figs. 3 and 4 illustrate a structural modification which accords in allfessential particulars with the construction above described, is furtherdesigned to minimize the obstruction to the view of the engineer ooeasioned by the outside location.` of thev branch steam pipes, To thisend, said pipes, instead of being orwardly and downy inclined from thethrottle box, as in the instance irst described, are first curricdforward horizontally therefrom, and are then extended downwardly,projecting into inclined lateral openings, 4, in t e smoke box, whichare preferably located in, or nearly in, line with the transversecentral plane. of the stack. Said openings are closed, on the innersides of the branch steam pipes, by cover plates, if, which are secureddetachably to the smoke box, to admit of the insertion and removal ofboiler tubes adjoining the sides of the boiler.

n addition to the advantages, common to all superheater designs in whichthe throttle valve is located between the saturated steam cbmpartmentand the engine cylinders, 1I. c., of reducing the liability todestruction of the units through heatapplied thereto, by maintainin themconstantly filled with steam; the elimination of dampers and their openating mechanism; and the capacity' o quicker starting and stopping ofthe locomotive, m invention reduces obtains in ports `the throttle box,throttle valve, an connecting pipe, inde endently of the superheaterheader, there y preventing the ob jeetionable imposition of weightthereon, and locates the throttle valve in position where it 1s readilyaccessible and is not subjected to the injurious action of a high degreeof `d necessitatesyfor its application,

, ht inexpensive change in the construction. Vg'rsent standardsuperheater header. HI c1am,as myyrinvention and desire to Dllrs P;tent: l. The combinan n, with. a locomotive boiler, .of a superbes@`header located in the V smoke "box, and having a single ydeliverynozzle entire! ine psedtherein; a ,throttle box support ,ind pendentlyof the superheater header, on t e exterior of` the'boiler shell; anangle pipe secured to, and suppr through the smoke box .and beingconnected, at its lower end, to the deliveryl nozzle o the superheaterVheader branch steam pipes by, the throttle box. said pipe passing u nndfsupported by, the

lading, exterior to the, boiler from the throttle box to connectionswith the distribu- 'ion vulve' chests of the engine; and a throtalf:valve seating in the throttle box and control-ling communicationtherefrom to the branch steam ipes.

2. The com ination, withV n locomotive boiler of a superheater headerlocated in the smoke box, and having u .single delivery nozzle entirel"inclosed therein; a throttle box supported, independently of thesuperheater header, on the exterior of the boiler shell, and haring aforwardly extending delivery nozzle; an. angle pipe secured to, deliverynozzle, said pipe passing through the smoke box, and be` ing connected,at its lower end, to the delivery nozzle of the snperheater header;lfnll joint rings interposed between the single pipe andthe throttle boxand superheaiter header; brunch steam pipes leading, exterior to theboiler` from the throttle box to com nee-tionsv 'with the distributionvalve chests of the engine; Aand a throttle valve seating in thethrottle boxnnd contqgilling eom- 25 munication therefrom to the branchsteam pipes.

3. The Combination, with a locomotive boi-ler, of a smoke box hnvinrinclined lat-- eral openings; a superheater eader located 3o in thesmoke box; n throttle box sup orted independentlyl of the superheuterhen er, on the exterior of the boiler shell; e pipe passing through thesmoke box and connecting the superheuted Steam compartment of the 35header with the throttle box; branch steam pipes leading from thethrottle box to eonnections with the distribution valve chestsl of theengine und extending longitudinally in lthe lateral openings of thesmoke box; 40 and cover plates fitted over Said openings und .secureddetuehably to the smoke box` HARRY S. VINCENT. Witnesses:

J. M. MAYNARD, F. A. WADSWORTH.

